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Preparation method of epoxidized hydroxyl-terminated polybutadiene liquid rubber

A technology for epoxidizing hydroxyl-terminated polybutadiene and liquid rubber, applied in the rubber field, can solve problems such as poor mechanical properties of liquid rubber, and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2018-06-01
CHENGDU JINHUI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of poor mechanical properties of liquid rubber in the prior art, and provides a method for preparing epoxidized hydroxyl-terminated polybutadiene liquid rubber. The epoxidized hydroxyl-terminated polybutadiene liquid prepared by the method is Rubber has excellent mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of epoxidized hydroxyl-terminated polybutadiene liquid rubber, comprising the following processing steps:

[0020] A. Add hydroxyl-terminated polybutadiene and methyl ethyl ketone to a 1000ml four-necked round-bottomed flask with an electric stirrer, condenser tube, feeding port and nitrogen inlet tube, and stir to dissolve; then continue to add formic acid and sodium sulfamate , fully mixed evenly;

[0021] B. Raise the temperature of the constant temperature water bath to 30°C, continue to stir and add hydrogen peroxide dropwise, and react for 6 hours;

[0022] C. The temperature of the reaction system is lowered to room temperature, and the reaction materials are transferred to a separatory funnel; the reaction materials are statically layered, and the organic layer is kept and washed to neutral with deionized water; the organic phase washed to neutral is decompressed Distillation to obtain a colorless and transparent viscous liquid, that is, ep...

Embodiment 2

[0028] A preparation method of epoxidized hydroxyl-terminated polybutadiene liquid rubber, comprising the following processing steps:

[0029] A. Add hydroxyl-terminated polybutadiene and methyl ethyl ketone to a 1000ml four-necked round-bottomed flask with an electric stirrer, condenser tube, feeding port and nitrogen inlet tube, and stir to dissolve; then continue to add formic acid and sodium sulfamate , fully mixed evenly;

[0030] B. Raise the temperature of the constant temperature water bath to 40°C, continue to stir and add hydrogen peroxide dropwise, and react for 7 hours;

[0031] C. The temperature of the reaction system is lowered to room temperature, and the reaction materials are transferred to a separatory funnel; the reaction materials are statically layered, and the organic layer is kept and washed to neutral with deionized water; the organic phase washed to neutral is decompressed Distillation to obtain a colorless and transparent viscous liquid, that is, ep...

Embodiment 3

[0037] A preparation method of epoxidized hydroxyl-terminated polybutadiene liquid rubber, comprising the following processing steps:

[0038] A. Add hydroxyl-terminated polybutadiene and methyl ethyl ketone to a 1000ml four-necked round-bottomed flask with an electric stirrer, condenser tube, feeding port and nitrogen inlet tube, and stir to dissolve; then continue to add formic acid and sodium sulfamate , fully mixed evenly;

[0039] B. Raise the temperature of the constant temperature water bath to 35°C, continue to stir and add hydrogen peroxide dropwise, and react for 6.5 hours;

[0040] C. The temperature of the reaction system is lowered to room temperature, and the reaction materials are transferred to a separatory funnel; the reaction materials are statically layered, and the organic layer is kept and washed to neutral with deionized water; the organic phase washed to neutral is decompressed Distillation to obtain a colorless and transparent viscous liquid, that is, ...

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Abstract

The invention relates to a preparation method of epoxidized hydroxyl-terminated polybutadiene liquid rubber and belongs to the technical field of rubber. The preparation method of the epoxidized hydroxyl-terminated polybutadiene liquid rubber has the beneficial effects that epoxidizing modification can be carried out on hydroxyl-terminated polybutadiene liquid rubber (HTPB) by adopting a peroxyformic acid in-situ method for all the raw materials so as to prepare the epoxidized hydroxyl-terminated polybutadiene liquid rubber with excellent mechanical property.

Description

technical field [0001] The invention relates to a method for preparing liquid rubber, more specifically, the invention relates to a method for preparing epoxidized hydroxyl-terminated polybutadiene liquid rubber, which belongs to the technical field of rubber. Background technique [0002] Hydroxyl-terminated polybutadiene (HTPB for short) is a liquid telechelic polymer. It reacts with chain extender and crosslinking agent to form a cured product with one-dimensional network structure, which has excellent mechanical properties and good hydrolysis resistance, acid and alkali resistance, wear resistance, low temperature resistance and electrical insulation properties. [0003] Epoxidized hydroxyl-terminated polybutadiene (EHTPB) is the product of introducing epoxy groups into the macromolecular chain of HTPB, which can not only effectively improve the polarity, but also introduce epoxy groups as reactive functional groups, which can be combined with polyurethane The amino act...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08C19/06
CPCC08C19/06
Inventor 张一帆
Owner CHENGDU JINHUI TECH
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